Enduro Zero Pulley Assemblies use grade 5 ceramic bearings. Races are won and lost by derailleur pulley drag.Sold in Pairs 9 Grams ABEC 5 precision cartridge bearing CERBEC USA Grade 3 Si3n4 Silicon Nitride balls 52100 high carbon Chromium alloy races Races receive 3 cryogenic treatments and a rust proof Magnetite finish "VV" type 2-lip non-contact Silicone labyrinth seals Nylon/graphite retainer
| Fits Brand | Shimano |
| Drivetrain Speeds | 11 |
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